Implementation Steps:

Step $1$: Algorithm selection

Please select one encryption algorithm from the following list:

Caesar Cipher: The Caesar cipher is one of the simplest encryption techniques. It is a substitution cipher that shifts the letters of the plaintext by a fixed number of positions down the alphabet.

Substitution Cipher: Substitution ciphers replace each letter in the plaintext with another letter, symbol, or number based on a predefined substitution table or key.

Transposition Cipher: Rearranges the letters in the plaintext without changing their values.

Vigen$$re cipher: In the Vigen$$re cipher, each letter in the plaintext is shifted based on a keyword. The keyword is repeated to match the length of the plaintext.

Step $2$: Implementation

Implement the chosen encryption algorithm using your preferred programming language $($e$.$g$.,$ Python, Java.... etc.$).$

Allow users to input a plaintext message and choose an encryption key $($if applicable$).$ Encrypt the message using the selected algorithm and display the encrypted text.

Enable users to input an encrypted message and the decryption key $($if applicable$)$ to decrypt the message. Display the decrypted text.

$1$Use appropriate data structures and functions for the algorithm's key generation, encryption, and decryption processes.

I want to do $1$ ceasar cipher and implement it using python and explain the code